Can someone help me solve this
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Can someone help me solve this

[From: ] [author: ] [Date: 11-09-04] [Hit: ]
......
Find the value of "a" if a line containing the point (a,-3a) has a y-intercept of 7 and a slope of -2/3.
Thanks!

-
two points:

(a, - 3a) and (0, 7)

slope = m = (7 + 3a)/(- a) = - 2/3

solve for a: 3(7 + 3a) = 2a

21 + 9a = 2a
7a = - 21

a = - 3

1
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